JP7448215B2 - LED lighting equipment - Google Patents

Description

The present invention relates to LED lighting equipment.

In recent years, LED lighting equipment using power-saving and long-life light emitting diodes (LEDs) has become popular in place of fluorescent lamps and the like. For example, an LED lighting device has been proposed in which a plurality of LEDs are arranged on a substrate circumferentially and covered with an annular cover (see Patent Document 1). However, the LED lighting fixture described in Patent Document 1 has a problem in that, for example, when it is installed on a ceiling and looked up from directly below, the center part appears dark.

To solve this problem, an LED lighting device has been proposed in which a plurality of LEDs are arranged concentrically and each LED is individually covered with a hemispherical cover (see Patent Document 2).

Japanese Patent Application Publication No. 2008-124008 Japanese Patent Application Publication No. 2014-67529

According to the LED lighting fixture described in Patent Document 2, the center part appears bright when looking up from directly below due to the lens effect brought about by the cover. However, in general, the structure of the cover in the LED lighting equipment described in Patent Document 2 has a problem in that light is too diffused and loss increases.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an LED lighting fixture that, for example, is installed on a ceiling and looks bright in the center when viewed from directly below, and has less light loss.

In order to achieve the above object, the LED lighting equipment of the present invention has the following features:
a main body having a circumferential band-shaped recess recessed toward the upper surface around an opening protruding toward the lower surface in the center ;
a power supply board disposed in the recess around the opening of the main body;
an LED board arranged on the lower surface side of the power supply board and having a plurality of LEDs mounted thereon;
comprising a cover that covers the mounting surface of the LED board ,
The cover has an inner peripheral region, an outer peripheral region, and an intermediate region located between the inner peripheral region and the outer peripheral region,
The inner peripheral region has a first thick portion that is thicker than the intermediate region and has a swollen shape.
It is characterized by

For example, when the LED lighting fixture of the present invention is installed on the ceiling and looked up from directly below, the center part appears bright and there is little light loss.

FIG. 1 is an exploded perspective view showing an example of each component of the LED lighting fixture of Embodiment 1. FIGS. 2A and 2B are a cross-sectional view and a bottom view showing an example of the LED board and cover in the LED lighting fixture of Embodiment 1. FIG. FIGS. 3A and 3B are a cross-sectional view and a bottom view showing an example of an LED board and a cover in an LED lighting device according to a second embodiment.

In the LED lighting device of the present invention, the LEDs are mounted concentrically on the mounting surface of the LED board, and the first thick part covers the inside of the LEDs mounted on the circumference closest to the center. May be covered.

In the LED lighting device of the present invention, the first thick portion may have a surface treated.

In the LED lighting device of the present invention, the thickness of the first thick portion is, for example, in the range of 2 mm to 6 mm.

In the LED lighting device of the present invention, the thickness of the first thick portion is, for example, in a range of 1.2 to 1.5 times the thickness of the intermediate region.

In the LED lighting device of the present invention, the cover may further include a second thick portion in the outer peripheral region that is thicker than the intermediate region.

In the LED lighting device of the present invention, the LEDs are mounted concentrically on the mounting surface of the LED board, and the second thick part covers the outside of the LED mounted on the circumference farthest from the center. May be covered.

In the LED lighting device of the present invention, the second thick portion may have a surface treated.

In the LED lighting device of the present invention, the thickness of the second thick portion is, for example, in the range of 2 mm to 6 mm.

In the LED lighting device of the present invention, the thickness of the second thick portion is, for example, in a range of 1.2 to 1.5 times the thickness of the intermediate region.

Hereinafter, the LED lighting equipment of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following explanation. Note that in FIGS. 1 to 3 below, the same parts are denoted by the same reference numerals, and the explanation thereof may be omitted. Further, in the drawings, for convenience of explanation, the structure of each part may be appropriately simplified and the dimensional ratio of each part may be different from the actual one and may be shown schematically.

[Embodiment 1]
This embodiment is an example of an LED lighting device having a thick portion in the inner circumferential region of the cover. FIG. 1 shows an example of the configuration of the LED lighting fixture of this embodiment. FIG. 1 is an exploded perspective view of the main components of an LED lighting fixture. In this embodiment, the LED lighting fixture is circular, but it is not limited to this.

The LED lighting fixture of this embodiment can be used, for example, as an LED ceiling light that is attached to a ceiling. In this case, the LED lighting device has, for example, a mounting portion, and the ceiling includes an indoor wiring device such as a hanging ceiling body, and an adapter electrically connected to the indoor wiring device. The LED lighting fixture is attached to the adapter by the mounting portion, and is electrically connected to the indoor wiring fixture. In the following description, unless otherwise specified, the LED lighting equipment is based on the state where it is attached to the ceiling, and the ceiling side is referred to as the upper surface side, and the opposite side (floor side) is referred to as the lower surface side.

As shown in FIG. 1, the LED lighting fixture 1 includes, from the top side, a main body 10, a power supply board 14, a power supply cover 15, an LED board 11 on which a plurality of LEDs 111 are mounted, a cover 12, and a globe 13 arranged in this order. has been done. In the LED lighting fixture 1, the power supply board 14, the power supply cover 15, and the globe 13 are arbitrary constituent members, and may or may not be included.

The main body 10 is a member facing the ceiling, its upper surface is a surface facing the ceiling, and its lower surface is a surface on which the LED board 11 is arranged. The main body 10 has an opening 101 in the center that protrudes toward the lower surface, and has a circumferential band-shaped recess 102 from the center and around the opening that is recessed toward the upper surface. In the former protruding opening 101, a mounting portion for the ceiling is disposed, and in the latter circumferential band-shaped recess 102, for example, a power supply board 14, which will be described later, is disposed. The material of the main body 10 is not particularly limited, and examples thereof include metals such as steel.

The upper surface of the main body 10 is an installation surface that faces the installation target (the ceiling) of the LED lighting fixture 1, and a buffer member that contacts the installation target may be arranged on the installation surface, for example. The buffer member is not particularly limited, and examples thereof include sponges and the like. According to such a form, when the LED lighting fixture 1 is installed on the installation target, since the buffer member exists between the LED lighting fixture 1 and the installation target, for example, the LED lighting fixture on the installation target is The immobilization of 1 can be made more stable.

The installation position of the buffer member is not particularly limited. The buffer member is arranged, for example, in the circumferential direction on the installation surface of the main body 10, and as a specific example, if the length from the center of the LED lighting fixture 1 to the outer periphery of the main body 10 is 1, then the buffer member is 2 from the center. The range is /5 to 1. The buffer members may be arranged continuously or discontinuously in the circumferential direction, for example. Further, when the upper surface of the main body 10 is flat, the buffer member is arranged, for example, on the outer circumferential side of the main body 10, and from the viewpoint of appearance, it is preferable that the buffer member is inward to the extent that it cannot be seen from the outside.

As described above, the power supply board 14 may be placed in the circumferential band-shaped recess 102 of the main body 10. The upper surface of the power supply board 14 faces the main body 10, and the power supply module that drives the light emission of the LED 111 is disposed on the lower surface thereof. The power supply module is not particularly limited, and may include conventionally known circuit components. When the LED lighting fixture 1 is electrically connected to the adapter on the ceiling, the power module of the power supply board 14 is connected to an AC power source via the adapter. Then, the power supply module can generate DC power from the received AC current, supply this to each LED 111 of the LED board 11, and drive the LEDs 111 to emit light. The power supply module has, for example, a control power supply for power control, and the voltage of the control power supply is, for example, 1.5V to 17V. The control power source may be, for example, one system or two systems, and an example thereof is two systems of 5V and 14V.

The power supply cover 15 has an upper surface facing the power supply board 14 and a lower surface facing the LED board 11. When the LED lighting fixture 1 has the power supply cover 15, the space inside the main body 10 can be divided into two rooms by the power supply cover 15, for example. According to the power supply cover 15, for example, it is possible to promote heat dissipation from the LED 111, block heat dissipation emitted from the power supply board 14, fix the LED board 11, etc. more efficiently. The material of the power supply cover 15 is not particularly limited, and examples thereof include metals such as aluminum and steel.

The LED board 11 has an upper surface facing the main body 10 and, if it has a power supply cover 15, facing the power supply cover 15, and a lower surface facing the cover 12 and a mounting surface on which the LEDs 111 are mounted. be. When the LED lighting fixture 1 is installed on the ceiling, the mounting surface of the LED 111 will be on the front side, and will illuminate the downward direction.

In the LED board 11, the mounting form of the plurality of LEDs 111 is not particularly limited. The plurality of LEDs 111 are mounted on the circumference of the LED board 11, for example. The number of circumferences is not particularly limited, and, for example, a plurality of concentric circumferences is preferable. The mounting intervals of the LEDs 111 on the same circumference may be, for example, equal intervals or different intervals. On adjacent circumferences, the LEDs 111 may be mounted on the same line from the center toward the outer circumference, or may be mounted in a shifted positional relationship.

In FIG. 1, the center of the LED board 11 has an opening, but it may not have an opening. Further, in FIG. 1, the shape of the LED board 11 is a regular octagon, but it may be other shapes such as a circle. Further, in FIG. 1, the LED board 11 is a single board, but it may be an assembly of a plurality of boards. If the LED board 11 is formed into a single board, the number of manufacturing steps such as assembly can be reduced.

The upper surface of the cover 12 faces the LED board 11, and the lower surface serves as an irradiation surface. The member of the cover 12 may be, for example, a member having a light transmitting property and further having a diffusing property, and specific examples thereof include a light transmitting resin such as a polycarbonate resin or an acrylic resin.

The cover 12 will be described in more detail with reference to FIGS. 2(A) and 2(B). FIGS. 2(A) and 2(B) are a cross-sectional view and a bottom view showing an example of the LED board 11 and cover 12 in the LED lighting fixture 1 of this embodiment. As shown in FIGS. 2(A) and 2(B), the cover 12 has an inner peripheral region 12a, an outer peripheral region 12c, and an intermediate region 12b located between the inner peripheral region 12a and the outer peripheral region 12c. , covering the mounting surface of the LED board 11.

The cover 12 has a first thick portion in the inner peripheral region 12a that is thicker than the intermediate region 12b. Due to the lens effect brought about by the first thick portion, the center of the LED lighting fixture 1 of this embodiment appears bright when, for example, it is installed on a ceiling and looked up from directly below. Moreover, the LED lighting fixture 1 of this embodiment is similar to the LED lighting fixture described in Patent Document 2 in which a plurality of LEDs are arranged concentrically and each LED is individually covered with a hemispherical cover. It does not spread to other parts, resulting in less loss. Moreover, according to the LED lighting fixture 1 of this embodiment, since there is less light loss, for example, by appropriately adjusting the number of LEDs 111 mounted, the LED lighting fixture 1 consumes less power and generates less heat than the LED lighting fixture described in Patent Document 2. The amount can be reduced. As shown in FIG. 2(A), it is preferable that the first thick portion has a shape that gently slopes from the intermediate region 12b and bulges toward the center. It may also have a round shape.

The thickness of the first thick portion is not particularly limited, but is, for example, in the range of 2 mm to 6 mm. Further, the thickness of the first thick portion is, for example, in a range of 1.2 to 1.5 times the thickness of the intermediate region 12b.

As shown in FIGS. 2(A) and 2(B), the first thick portion may cover the inside of the LED 111 mounted on the circumference closest to the center. It is preferable that the first thick portion covers about half of the inner side of the LED 111 mounted on the circumference closest to the center.

The first thick portion may have a surface treated. If the first thick portion has a surface that has been surface-treated, it is possible to suppress the occurrence of striped patterns due to uneven illuminance and interference, which are problems in appearance when the glove 13 is provided. The surface treated surface may be provided only on the outer surface of the first thick portion, only on the inner surface of the first thick portion, or may be provided on the outer surface and the inner surface. Both surfaces may have it. Moreover, the surface treated may be a part of the outer surface and the inner surface, or may be the entire surface. As an example of the surface treatment, the surface of the first thick portion may have grains.

The globe 13 has a dome shape that covers the main body 10, the power supply board 14, the power supply cover 15, the LED board 11, and the cover 12, and is made of, for example, translucent (including milky white, transparent, and translucent) resin such as acrylic resin. It is formed. Light diffusing particles, pigments, etc. may be dispersed in the globe 13. Further, at least one of the outer surface and the inner surface of the glove 13 may be roughened by sandblasting or the like, or may have grains. As the globe 13, for example, one similar to that used in conventionally known lighting equipment may be used.

[Embodiment 2]
This embodiment is an example of an LED lighting fixture that has a thick portion not only in the inner peripheral region of the cover but also in the outer peripheral region of the cover. The LED lighting fixture of this embodiment is the same as the LED lighting fixture 1 of Embodiment 1, except that the outer circumferential region of the cover further includes a second thick portion that is thicker than the middle region.

FIGS. 3A and 3B are a cross-sectional view and a bottom view showing an example of the LED board 11 and cover 12 in the LED lighting device of this embodiment.

The cover 12 has a first thick part thicker than the intermediate area 12b in the inner circumferential area 12a, and has a second thick part thicker than the intermediate area 12b in the outer circumferential area 12c. According to the LED lighting fixture of this embodiment, in addition to the effects provided by the LED lighting fixture 1 of Embodiment 1, brightness on the outer peripheral side can also be ensured due to the lens effect brought about by the second thick portion. Therefore, according to the LED lighting fixture of this embodiment, for example, it is possible to further improve the uniformity of brightness when installed on the ceiling and looking up from directly below. As shown in FIG. 3(A), it is preferable that the second thick portion has a shape that gently slopes from the intermediate region 12b and bulges outward. It may be a shape.

The thickness of the second thick portion is not particularly limited, but is, for example, in the range of 2 mm to 6 mm. Further, the thickness of the second thick portion is, for example, in a range of 1.2 to 1.5 times the thickness of the intermediate region 12b.

As shown in FIGS. 3A and 3B, the second thick portion may cover the outside of the LED 111 mounted on the circumference farthest from the center. It is preferable that the second thick portion covers about half of the outer side of the LED 111 mounted on the circumference farthest from the center.

The second thick portion may have a surface treated. If the second thick portion has a surface treated surface, it is possible to suppress the occurrence of striped patterns due to uneven brightness and darkness and interference, which are problems in appearance when the glove 13 is provided. The surface treated surface may be provided only on the outer surface of the second thick portion, only on the inner surface of the second thick portion, or may be provided on the outer surface and the inner surface. Both surfaces may have it. Moreover, the surface treated may be a part of the outer surface and the inner surface, or may be the entire surface. As an example of the surface treatment, the surface of the second thick portion may have grains.

Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the above embodiments. Various changes can be made to the configuration and details of the present invention that can be understood by those skilled in the art within the scope of the present invention.

For example, when the LED lighting fixture of the present invention is installed on a ceiling and looked up from directly below, the center part appears bright and there is little loss of light. The LED lighting fixture of the present invention can be used for a wide range of purposes, such as an indoor ceiling light.

1 LED lighting fixture 10 Main body 11 LED board 12 Cover 12a Inner region 12b Intermediate region 12c Outer region 13 Globe 14 Power supply board 15 Power supply cover 111 LED

Claims (5)

a main body having a circumferential band-shaped recess recessed toward the upper surface around an opening protruding toward the lower surface in the center;
a power supply board disposed in the recess around the opening of the main body, an upper surface facing the main body and a power supply module disposed on the lower surface;
an LED board arranged on the lower surface side of the power supply board and having a plurality of LEDs mounted thereon;
comprising a cover that covers the mounting surface of the LED board,
The cover has a lower surface substantially parallel to the LED board, an inner surface including an inner peripheral region, an outer peripheral region, an intermediate region located between the inner peripheral region and the outer peripheral region, and the inner surface in the center. an opening surrounded by a peripheral region ;
The inner circumferential region has a first thick portion that is gently inclined toward the LED substrate from the intermediate region toward the opening , and has a shape that increases in thickness as it approaches the opening ;
An LED lighting device, wherein the inner surface of the cover is substantially parallel to the LED board in the intermediate region. The LED lighting fixture according to claim 1, wherein the first thick portion covers at least a part of the center side of the most central LED among the plurality of LEDs . The cover further includes a second wall in the outer circumferential area, which has a shape that gently slopes toward the LED board from the intermediate area toward the outside of the cover , and increases in thickness as it approaches the outside of the cover. The LED lighting device according to claim 1 or 2, having a thick portion. 4. The LED lighting fixture according to claim 3, wherein the second thick portion covers at least a portion of the outside of the outermost LED of the plurality of LEDs . The power supply board is disposed between the main body and the LED board with a power supply cover interposed therebetween,
3. The LED lighting fixture according to claim 1, further comprising a dome-shaped globe on the lower surface side of the cover , which covers the main body, the power supply board, the power supply cover, the LED board, and the cover.

Images